A side note about Signature. With four additional E190's coming into YX-branded flying by early February, 11 of Midwest's 24 "mainline" markets will have all or some flights with the 2x1 cabin. That increases to 16 of 24 city pairs with a premium section if you include Frontier's "stretch". The MKE-east coast markets will still be mostly E170 in February, but from what I've heard those will see upgrades as we get further into spring and more E190's arrive.